wrote in message
...
On Wed, 21 Aug 2019 19:05:44 -0500, Arthur Conan Doyle
wrote:

Ralph Mowery wrote:

For heat pumps you can say that electricity is more than 100% efficient.

The heat transfered from the outside is more than the heat produced by
electricity if used as resistance heating.

True. However, heat pumps are decidedly more expensive than conventional
furnaces to install and maintain, so that does need to be considered.

If you live in a place where heat pumps actually work, you probably
have an A/C anyway. The incremental cost for the reversing valve is
minimal.

There's more involved than just a reversing valve.